Orthworm in depth
An earthworm made of ore
Orthworm’s starting point is simple: an earthworm. The species adds metal plates, a toothed mouth, and side appendages that look like arms, presenting an underground animal turned into a machine. Its iron-based diet explains both its Steel typing and its connection to the ground that appears in its Pokédex entries. It is not a mineral creature like Glimmet, but it shares the idea that Paldea mixes living organisms with materials extracted from the terrain.
The English name combines “ore”, a metallic mineral, with “worm”, an earthworm. In Japanese, ミミズズ (Mimizuzu) uses mimizu, “earthworm”, together with zuzuzu, an onomatopoeia associated with moving underground. The etymology describes the concept without hiding it: it is an earthworm that digs and eats metal.
The contrast between size and function
Its Titan Pokémon version exaggerates the species’ size and turns it into a mobile obstacle during the Paldean adventure. The regular form already reaches 2.5 m, but the encounter with the Titan presents a much larger scale. That difference separates its everyday behaviour from the spectacle of the story: outside the plot battle, it remains a single-form Pokémon with no evolution.
As a visual reference, Steelix also turns the idea of an underground snake or worm into a metallic body. Orthworm is less aggressive in its silhouette and more expressive in its arms, which support the description of its punches. Unlike Wormadam, another species related to worms, it does not change appearance according to its environment or need an outer layer to define its form.
What to do with its 145 Defense
The clearest way to use it is to switch in against a physical attacker, take advantage of Earth Eater against Ground, and set Stealth Rock or Spikes. It can then use Iron Defense to improve its durability and Body Press to turn that Defense into offensive pressure. The plan works best when the opponent does not have a special attacker ready and when the team can help it preserve HP.
Iron Head is its most direct Steel attack, while Earthquake covers targets that do not want to face its main physical moves. Heavy Slam is also available, although its power depends on the target’s weight and it should not be treated as a universal attack. Autotomize provides a Speed boost, but it does not by itself fix its lack of power or its 55 Special Defense.
Its limits since debut
Orthworm debuted in Generation IX, so it has no history of changes between earlier generations. Its main mechanical novelty was arriving with Earth Eater, an ability that completely changes the usual relationship between a Steel-type Pokémon and Ground moves. Rather than merely resisting or avoiding them, it can recover when hit by them.
That advantage comes at a cost. Its Steel typing leaves it exposed to Fire and Fighting, while its 55 Special Defense allows many special attackers to force it out. It also becomes less effective if it takes residual damage over several turns or if the opponent applies pressure before it can establish hazards. In regular battles, it performs best when it comes in after a predictable switch, especially against teams that lean heavily on Ground, rather than when it is forced to withstand varied attacks from the first turn.